package com.cdqidi.core.weixinmanager.service;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cdqidi.constant.ConstantDto;
import com.cdqidi.core.weixinmanager.domain.SubscribeDTO;
import com.cdqidi.core.weixinmanager.mapper.SubscribeMapper;
import com.cdqidi.core.weixinmanager.model.Subscribe;
import com.cdqidi.db.BaseService;
import com.cdqidi.dto.CacheKey;
import com.cdqidi.exception.ApiException;
import com.cdqidi.util.RedisTemplateUtil;
import com.jfinal.weixin.sdk.msg.in.event.InSubscribeNoticesEvent;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.time.Instant;
import java.time.ZoneOffset;
import java.util.*;

import static java.util.stream.Collectors.toList;
import static java.util.stream.Collectors.toSet;

/**
 * 订阅结果
 *
 * @author sjk
 */
@RequiredArgsConstructor
@Service
@Slf4j
public class SubscribeService extends BaseService<SubscribeMapper, Subscribe> {

    private static final String PREFIX_ID = "sys_wx_subscribe_sid_{0}";
    private static final String PREFIX_UNIQUE_SYS_WX_SUB = "sys_wx_subscribe_openid_{0}_templateId_{1}";

    private final RedisTemplateUtil<Subscribe> redisTemplateUtil;
    /**
     * 保存
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public SubscribeDTO save(SubscribeDTO dto) {
        checkUnique(dto);
        final Subscribe model = dtoToModel(dto);
        try {
            if (super.save(model)) {
                return modelToDto(model);
            }
            throw new ApiException("添加失败");
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 修改
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public SubscribeDTO update(SubscribeDTO dto) {
        checkUnique(dto);
        final Subscribe historyModel = Optional.ofNullable(getById(dto.getSid())).orElseThrow(() -> new ApiException("ID不存在,不能更新"));
        final Subscribe model = dtoToModel(dto);
        try{
            if (super.updateById(model)) {
                return modelToDto(model);
            }
            throw new ApiException("更新失败");
        }finally {
            clearCache(historyModel);
            historyModel.freeData();
            model.freeData();
        }
    }

    /**
     * 批量添加
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void saveBatch(List<Subscribe> mList) {
        try {
            if (!super.saveBatch(mList)) {
                throw new ApiException("批量添加失败");
            }
        } finally {
            clearCaches(mList);
        }
    }

    /**
     * 批量更新
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void updateBatchIds(List<Subscribe> mList) {
        final List<String> ids = mList.stream().map(Subscribe::getSid).collect(toList());
        final List<Subscribe> historyModelList = checkIds(ids);
        try {
            if (!super.updateBatchById(mList)) {
                throw new ApiException("批量更新失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
            ids.clear();
        }
    }

    /**
     * 删除，单个
     *
     * @param sid 主键 
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeById(String sid) {
        final Subscribe historyModel = Optional.ofNullable(getById(sid)).orElseThrow(() -> new ApiException("数据不存在,不能删除"));
        try {
            if (!super.removeById(sid)) {
                throw new ApiException("删除失败");
            }
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
        }
    }

    /**
     * 批量删除
     *
     * @param ids 主键集合
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeBatchIds(List<String> ids) {
        final List<Subscribe> historyModelList = checkIds(ids);
        try {
            if (!super.removeByIds(ids)) {
                throw new ApiException("批量删除失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
        }
    }

    /**
     * 根据传入对象构建查询参数，判断是否存在
     *
     * @param dto 参数
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExists(SubscribeDTO dto) {
        final QueryWrapper<Subscribe> queryWrapper = createQueryWrapper(dto);
        final boolean exists = super.count(queryWrapper) > 0;
        queryWrapper.clear();
        return exists;
    }

    /**
     * 根据主键判断数据是否存在
     *
     * @param sid 主键 
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExistsById(String sid) {
        boolean exists = false;
        if (StringUtils.hasLength(sid)) {
            final Subscribe model = getById(sid);
            exists = (null != model);
            if (exists) {
                model.freeData();
            }
        }
        return exists;
    }

    /**
     * 根据主键获取数据
     *
     * @param sid 主键 
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public Subscribe getById(String sid) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, sid);
        return redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getById(sid), Subscribe.class);
    }

    /**
     * 根据主键获取数据
     *
     * @param sid 主键 
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public SubscribeDTO getByIdDto(String sid) {
        return Optional.ofNullable(getById(sid)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public Subscribe getOne(SubscribeDTO dto) {
        final QueryWrapper<Subscribe> queryWrapper = createQueryWrapper(dto);
        Subscribe model = super.getOne(queryWrapper);
        queryWrapper.clear();
        return model;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public SubscribeDTO getOneDto(SubscribeDTO dto) {
        return Optional.ofNullable(getOne(dto)).map(this::modelToDto).orElse(null);
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据
     */
    @Transactional(readOnly = true)
    public List<Subscribe> getList(SubscribeDTO dto) {
        final QueryWrapper<Subscribe> queryWrapper = createQueryWrapper(dto);
        final List<Subscribe> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据，转换成页面对象
     */
    @Transactional(readOnly = true)
    public List<SubscribeDTO> getListDto(SubscribeDTO dto) {
        return modelToDtoList(getList(dto));
    }

    /**
     * 分页数据
     *
     * @param page 分页对象
     * @param dto  查询参数
     * @return 分页信息
     */
    @Transactional(readOnly = true)
    public IPage<SubscribeDTO> page(Page<Subscribe> page, SubscribeDTO dto) {
        final QueryWrapper<Subscribe> queryWrapper = createQueryWrapper(dto);
        Page<Subscribe> iPage = baseMapper.selectPage(page, queryWrapper);
        Optional.ofNullable(iPage.getRecords()).ifPresent(this::modelToDtoList);
        queryWrapper.clear();
        return iPage.convert(this::modelToDto);
    }

    /**
     * 根据唯一性索引获得数据
     * param openid 
     * param templateId 
     *
     * @return 单条数据
     */
    @Transactional(readOnly = true)
    public Subscribe getUniqueByOpenidAndTemplateId(String openid, String templateId) {
        final QueryWrapper<Subscribe> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("openid", openid);
        queryWrapper.eq("template_id", templateId);
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_UNIQUE_SYS_WX_SUB, openid, templateId);
        final Subscribe model = redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getOne(queryWrapper, false), Subscribe.class);
        queryWrapper.clear();
        return model;
    }

    /**
     * 验证唯一性索引
     *
     * @param dto 页面对象
     */
     @Transactional(readOnly = true)
     public void checkUnique(SubscribeDTO dto) {
        Subscribe model = getUniqueByOpenidAndTemplateId(dto.getOpenid(), dto.getTemplateId());
        if (null != model) {
            checkUnique(dto, model);
        }
    }

    /**
     * 验证唯一性索引
     *
     * @param dto   页面对象
     * @param model 根据约束字段查询出来的数据库对象
     */
    private void checkUnique(SubscribeDTO dto, Subscribe model) {
        if (!StringUtils.hasLength(dto.getSid())) {
            throw new ApiException("数据已存在，请勿重复操作");
        }
        if (!dto.getSid().equals(model.getSid())) {
            throw new ApiException("数据已存在，请勿重复操作");
        }
    }

    /**
     * 清空缓存
     *
     * @param model 数据库对象
     */
    public void clearCache(Subscribe model) {
        if (null == model) {
            return;
        }
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getSid()));
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_UNIQUE_SYS_WX_SUB, model.getOpenid(), model.getTemplateId()));
    }

    /**
     * 批量清空缓存
     *
     * @param list 数据库对象
     */
    public void clearCaches(List<Subscribe> list) {
        if (null == list || list.isEmpty()) {
            return;
        }
        List<String> ids = list.stream().map(model -> RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getSid())).collect(toList());
        if (!ids.isEmpty()) {
            redisTemplateUtil.deleteByKey(ids);
            ids.clear();
        }
        Set<String> uniqueIds = list.stream().map(model -> RedisTemplateUtil.getRedisCacheKey(PREFIX_UNIQUE_SYS_WX_SUB, model.getOpenid(), model.getTemplateId())).collect(toSet());
        if (!uniqueIds.isEmpty()) {
            redisTemplateUtil.deleteByKey(uniqueIds);
            uniqueIds.clear();
        }
    }

    /**
     * 数据库对象转页面对象
     *
     * @param model 数据库对象
     * @return 页面对象
     */
    public SubscribeDTO modelToDto(Subscribe model) {
        if (null == model) {
            return null;
        }
        final SubscribeDTO dto = new SubscribeDTO();
        dto.setSid(model.getSid());
        dto.setOpenid(model.getOpenid());
        dto.setTemplateId(model.getTemplateId());
        dto.setSubscribeStatus(model.getSubscribeStatus());
        dto.setOperatorTime(model.getOperatorTime());
        buildDisplay(dto);
        return dto;
    }

    /**
     * 页面对象转数据库对象
     *
     * @param dto 页面对象
     * @return 数据库对象
     */
    public Subscribe dtoToModel(SubscribeDTO dto) {
        if (null == dto) {
            return null;
        }
        final Subscribe model = new Subscribe();
        model.setSid(dto.getSid());
        model.setOpenid(dto.getOpenid());
        model.setTemplateId(dto.getTemplateId());
        model.setSubscribeStatus(dto.getSubscribeStatus());
        model.setOperatorTime(dto.getOperatorTime());
        return model;
    }

    /**
     * 码表转换
     *
     * @param dto 页面对象
     */
    public void buildDisplay(SubscribeDTO dto) {

    }

    /**
     * 数据库对象转页面对象
     *
     * @param list 数据库对象
     * @return 页面对象
     */
    public List<SubscribeDTO> modelToDtoList(List<Subscribe> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::modelToDto).collect(toList());
    }

    /**
     * 页面对象转数据库对象
     *
     * @param list 页面对象
     * @return 数据库对象
     */
    public List<Subscribe> dtoToModelList(List<SubscribeDTO> list) {
        return Optional.ofNullable(list).orElse(Collections.emptyList()).stream().map(this::dtoToModel).collect(toList());
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto 查询参数，不为空的属性会被自动加入
     */
    public QueryWrapper<Subscribe> createQueryWrapper(SubscribeDTO dto) {
        final QueryWrapper<Subscribe> queryWrapper = new QueryWrapper<>();
        if (null != dto) {
            if (StringUtils.hasLength(dto.getOpenid())) {
                queryWrapper.eq("openid", dto.getOpenid());
            }
            if (StringUtils.hasLength(dto.getTemplateId())) {
                queryWrapper.eq("template_id", dto.getTemplateId());
            }
        }
        return queryWrapper;
    }

    /**
     * 批量检查主键在数据库中是否存在
     *
     * @param ids 主键集合
     * @return 主键查询出来的集合
     */
    public List<Subscribe> checkIds(List<String> ids) {
        if (null == ids || ids.isEmpty()) {
            throw new ApiException("ids不能为空");
        }
        final List<Subscribe> list = super.listByIds(ids);
        if (list.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(ids.toArray()));
        }
        if (ids.size() == list.size()) {
            return list;
        }
        List<String> dbIds = list.stream().map(Subscribe::getSid).collect(toList());
        final List<String> notExistsList = ids.stream().filter(id -> !dbIds.contains(id)).collect(toList());
        dbIds.clear();
        if (!notExistsList.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(notExistsList.toArray()));
        }
        return list;
    }

    @Transactional(rollbackFor = Exception.class)
    public void saveOrUpdate(String fromUserName,Integer createTime,List<?> list) {
        if (null == list || list.isEmpty()) {
            return;
        }
        List<Subscribe> addList = new ArrayList<>(list.size());
        List<Subscribe> updateList = new ArrayList<>(list.size());
        for (Object o : list) {
            InSubscribeNoticesEvent.Item item = (InSubscribeNoticesEvent.Item)o;
            Subscribe subscribe = getUniqueByOpenidAndTemplateId(fromUserName, item.getTemplateId());
            if(null == subscribe){
                subscribe = new Subscribe();
                subscribe.setOpenid(fromUserName);
                subscribe.setTemplateId(item.getTemplateId());
                addList.add(subscribe);
            }else{
                updateList.add(subscribe);
            }
            subscribe.setOperatorTime(Instant.ofEpochSecond(createTime).atOffset(ZoneOffset.of("+08:00")).toLocalDateTime());
            if(item.getSubscribeStatusString().equals("accept")){
                subscribe.setSubscribeStatus(1);
            }else if(item.getSubscribeStatusString().equals("reject")){
                subscribe.setSubscribeStatus(2);
            }
        }
        if(!addList.isEmpty()){
            saveBatch(addList);
            addList.clear();
        }
        if(!updateList.isEmpty()){
            updateBatchIds(updateList);
            updateList.clear();
        }
    }
}